Verilog 写一个cordic 取模值的程序

以下是一个基于Cordic算法的Verilog程序，用于计算取模值：

module cordic_modulus (
input signed [31:0] x,
input signed [31:0] y,
input signed [31:0] phase,
output reg [31:0] modulus
);

// Define constants
localparam CORDIC_NTAB = 32;
localparam CORDIC_PI = 3.14159265358979323846;

// Define local variables
reg signed [31:0] z [0:CORDIC_NTAB-1];
reg signed [31:0] x_new;
reg signed [31:0] y_new;
reg signed [31:0] phase_new;
reg signed [31:0] modulus_new;
reg signed [31:0] angle;
reg signed [31:0] power_of_two;

// Initialize variables
initial begin
z[0] = {32'h3243F6A8, 32'h0};
for (int i = 1; i < CORDIC_NTAB; i = i + 1) begin
z[i] = z[i-1] >> 1;
end
modulus = 0;
end

// Calculate modulus using Cordic algorithm
always @(x or y or phase) begin
x_new = x;
y_new = y;
phase_new = phase;
modulus_new = 0;
angle = 0;

for (int i = 0; i < CORDIC_NTAB; i = i + 1) begin
if (y_new >= 0) begin
power_of_two = {1'b1, {i-1{1'b0}}};
angle = angle + z[i];
x_new = x_new + (y_new >> i);
y_new = y_new - (x_new >> i);
modulus_new = modulus_new + (y_new * power_of_two);
end else begin
power_of_two = {1'b1, {i-1{1'b0}}};
angle = angle - z[i];
x_new = x_new - (y_new >> i);
y_new = y_new + (x_new >> i);
modulus_new = modulus_new + (y_new * power_of_two);
end
end

if (angle >= CORDIC_PI) begin
modulus_new = -modulus_new;
end

modulus <= modulus_new;
end

endmodule

该程序需要三个输入：x、y和相位。输出为modulus。